A recent report from Oregon describes how researchers edited the genes in a human embryo.

An article in the NY times argues that it is huge leap from gene editing to designer babies, since most human traits require the interaction between a number of genes and the environment

There are thousands of what are called single gene mutation disorders that this gene editing technology may be able fix. Examples of this include Cystic Fibrosis, Tay Sachs disease and Sickle Cell Anemia. These types of diseases are due to a single gene mutation which could potentially be repaired using this technology. Many of these disorders can currently be screened for and diagnosed (if anticipated) during the IVF process using Preimplantion Genetic Diagnosis (PGD)

Picking out your child's height, or athletic or intellectual abilities are another story. Height alone is likely to controlled by tens of thousands of genes, of which less than a thousand have been identified. Even if all of the genetics could be worked out, the task of editing those genes would be enormous.

So, for now at least, designer babies are the stuff of science fiction.